Guide to Filling Out Merchant Mariner Credential (MMC ...

Mar 27, 2019 · only applies to the Merchant Mariner Credential (MMC). A separate authorization is required for a Medical Certificate. (6) Third Party Authorization: A third party is any person or company you approve to discuss your application with the NMC. You can limit what a third party can do, or you can authorize the third party to act

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